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. 2021 Apr 23;23(4):e26628. doi: 10.2196/26628

Table 6.

Optimal MAE and median percent error values for the out-of-distribution validation method.

	Train MAE^a	Validation MAE	Test MAE	Validation percent error	Test percent error
Ridge regression	0.296	0.240	0.247	2.26	1.22
Decision tree regression	0.117	0.109	0.114	1.15	0.12
Random forest regression	0.098	0.098	0.105	1.45	0.44
AdaBoost^b regression^c	0.207	0.081	0.089	1.40	0.39
Support vector regression	0.268	0.167	0.176	1.66	0.60

^aMAE: mean absolute error.

^bAdaBoost: adaptive boosting.

^cThe model with the lowest test MAE.